// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.firebase.components;

import java.util.Arrays;
import java.util.List;

/** Exception thrown when a dependency cycle is detected. */
public class DependencyCycleException extends DependencyException {
  private final List<Component<?>> componentsInCycle;

  public DependencyCycleException(List<Component<?>> componentsInCycle) {
    super("Dependency cycle detected: " + Arrays.toString(componentsInCycle.toArray()));
    this.componentsInCycle = componentsInCycle;
  }

  /** Returns a list of components that form a dependency cycle. */
  public List<Component<?>> getComponentsInCycle() {
    return componentsInCycle;
  }
}
